Ruby code snippet: Get the current class name

Get the currently running method name in Ruby on bigbold
Code Fragment:

Module Kernel
Private
Def This_method_name
Caller [0] = ~   / '([ ^ ' ] *) ' /   And $ 1
End
End

ClassFoo
 DefTest_method
This_method_name
End
End

Puts Foo. New. test_method#=> Test_method

Caller [0]= ~ /'([^'] *)'/ And$1. This syntax structure is hard to understand. Later I found that this writing is also done by caller [0] [/'([^'] *) '/, 1], so I checked the reference manual.The usage of caller is clear;

CallerReturns the [file name, row number, and method name].